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JBL Synchros E40BT

On-ear Bluetooth® headphones (Blue)

63 Reviews | 6 questions - 29 answers

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Item # 109E40BTL

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Overview

Our take on the JBL Synchros E40BT

You don't have to spend a lot of money to get headphones with Bluetooth wireless connectivity and good sound. The JBL Synchros E40BT delivers both at an impressively low price. They're cleverly styled, well built, and offer JBL's legendary sound, with PureBass technology ensuring your music has plenty of low-frequency power. Stow your smartphone in your pocket and listen wirelessly, using the the earcup controls to play and pause music, adjust the volume, or even take a hands-free call with the built-in microphone.

JBL Synchros E40BT

Earcup buttons keep you in control of music and calls when you're listening wirelessly with the Synchros E40BT (shown in Red).

Bluetooth on a budget

You don't have to spend a lot of money to get headphones with Bluetooth wireless connectivity and good sound. The JBL Synchros E40BT delivers both at an impressively low price. They're cleverly styled, well built, and offer JBL's legendary sound, with PureBass technology ensuring your music has plenty of low-frequency power. Stow your smartphone in your pocket and listen wirelessly, using the the earcup controls to play and pause music, adjust the volume, or even take a hands-free call with the built-in microphone.

Wireless or wired listening

The Synchros E40BT run on a built-in rechargeable battery, which provides up to 16 hours of use. If your battery runs down, you won't be stuck without music. Simply connect the included headphone cable and keep listening in wired mode. Then, use your computer or a USB AC charger to get your headphones charged up for more wireless use.

Share a song wirelessly

One pair of E40BT headphones is cool. Two pairs can do something really cool. You can stream music to another pair of headphones wirelessly using JBL's ShareMe™ technology. This allows two people to listen to the same song from the same source at the same time. You can share music with any two pairs of ShareMe compatible headphones.

love them they give me my quiet time on my computer

melvin, South Bend, IN

Featured Video:

What's in the Box:

  • On-ear Bluetooth headphones (blue)
  • 50" Straight audio cable (straight 2.5mm plug on one end and a right angled 3.5mm plug on other end)
  • 40" Straight USB cable for charging (straight 2.5mm plug on one end and Type A USB plug on other end)
  • Quick Start Guide
  • Warranty sheet

Product Highlights:

  • 40mm dynamic drivers
  • Bluetooth 3.0 and A2DP connectivity for wireless music listening and phone calls with compatible smartphones
  • earcup buttons offer music, volume, and call controls for compatible Bluetooth connected smartphones
  • built-in earcup microphone with echo-cancellation for clear, hands-free calls with a smartphone
  • PureBass technology delivers low-frequency response with detail and accuracy
  • ShareMe technology allows you to stream music wirelessly to a second pair of ShareMe compatible headphones
  • includes miniplug headphone cable for wired listening (disables Bluetooth functionality)
  • earcups swivel and fold flat for easy storage
  • built-in rechargeable battery provides up to 16 hours of music listening
  • USB charging cable included
  • frequency response: 20-22,000 Hz
  • impedance: 32 ohms
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews

JBL Synchros E40BT Reviews

Average Customer Review(s):

(63 Reviews)
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Details

Hands-on research

Features and Specs

General
Fit Style On-ear
Earcup Type Closed
Earcup Width x Height 2.839" x 2.839"
Noise-canceling No
Mic For Taking Calls Yes
iPhone Control Yes
Lightning Connector No
Android Control Yes
Frequency Response 20-22k Hz
Sensitivity 114 dB
Impedance 32 Ohms
Weight 7.23 ounces
Cord Length 40"
1/4-inch Adapter Included No
Volume Control Yes
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research

Features

Overview: The JBL Synchros E40BT Bluetooth headphones offer convenience and performance in one stylish and comfortable package. With ShareMe technology, you can even share your experience with another set of headphones. The E40BTs have a built-in Lithium-ion rechargeable battery that provides all day music playback capability. When the battery becomes exhausted, you can plug in the supplied auxiliary cable and continue listening.

Drivers: The Synchros E40BT over-the-ear headphones feature large 40mm drivers with PureBass performance in a lightweight closed design. The 32-ohm drivers give you crystal-clear stereo for enjoying your music or carrying on a phone conversation.

Bluetooth: The Synchros E40BT supports Bluetooth 3.0, with A2DP v1.3, AVRCP v1.5, HFP v1.6, and HSP v1.2. The left ear cup is equipped with a microphone featuring Konnexx echo-cancellation technology to give you a clean connection and clear, hands-free calling. The headphones are compatible with iPad (mini, 3rd and 4th gen), iPhone (5s, 5c, 5, and 4s), iPod touch, MacBook Air, MacBook Pro, Mac mini, Android 1.5 Cupcake to Android 4.4 KitKat, and Blackberry 1.0 to Blackberry 10 OS.

ShareMe: JBL's exclusive ShareMe technology lets you wirelessly and simultaneously share your music with another ShareMe-enabled headphone. When you are paired with a Bluetooth source device, you can then add a second pair of headphones and listen to the same source at the same time--a concert for two. ShareMe can be enabled using two E40BT headphones, a E40BT and an E50BT, or two E50BT headphones.

On-board Controls: The headphones' left ear cup includes a 4-way Multi-function Button (MFB) that lets you control your music playback and phone calls:

  • Press MFB up/down: Raises volume up or down
  • Press MFB forward:
    • Music: 1x play/pause; 2x next track; 3x previous track
    • Phone Calls: short press answer call; long press reject call; manage 2 calls at same time
  • Press and hold MFB forward: 1x fast forward; 2x fast reverse
  • Press MFB backward: ShareMe function

Battery: The built-in 3.7V Lithium-ion rechargeable battery (610 mAh) provides approximately 16 hours of music playback time, or 24 hours of phone talk time. The battery charges in approximately 3 hours via the included USB cable.

Specifications: The Synchros E40BT has the following specs:

  • Frequency Response: 20-22kHz
  • Maximum SPL: 114dB @ 30mW
  • Impedance: 32 ohms
  • BT Frequency Range: 2.402 - 2.480 GHz
  • Weight: 7.23 ounces

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Price [ MATTHEW  Feb 10, 2017 ]
JBL name has history of quality. Hope it still does. [ Daniel  Dec 16, 2016 ]
it seems that they deliver a niece sound with the Bluetooth technology. [ Lorenzo  Dec 12, 2016 ]
Jbl name and price [ Luis  Dec 07, 2016 ]
Purchased a pair of these as a gift, that person loved them so much I had to buy another pair for a Christmas gift. [ Kawhampshire  Nov 28, 2016 ]
Price and feature set [ Nicholas  Mar 18, 2016 ]
Great product [ DOUG  Feb 01, 2016 ]
My nephew requested this for Christmas [ Vernanda  Dec 24, 2015 ]
Good price point for the quality [ Robert  Dec 20, 2015 ]
Brand recognition and price point. [ Gregory  Dec 20, 2016 ]
Gift for daughter. [ Doug  Nov 28, 2016 ]
Right quality at a competitive price and we have purchased and liked other JBL products. [ Amy  Nov 28, 2016 ]
for my kid [ Ramon San  Jan 24, 2016 ]
Great reviews and they had Udub husky purple, Go Dawgs! [ Shawn  May 13, 2017 ]
Great price, brand reputation, design and good reviews. [ Daniel  Dec 31, 2016 ]
My husbands favorite brand and color [ Jess  Dec 28, 2016 ]
Good Reviews and was on SALE. Thank You! [ J  Nov 21, 2016 ]
Good brand. Good quality. Excellent sound. Good price! [ Michael  May 16, 2016 ]
Cheap wireless on ear head phones very comparable to the high priced ones [ Christopher  Jan 02, 2016 ]
Priced right for what you get. Battery life seems great along with size. [ Danny  Dec 18, 2015 ]
Wife liked mine [ J  Apr 17, 2017 ]
quality, price, name brand, information that was provided on this website for the product [ Tobias  Dec 04, 2016 ]
read the reviews and compared to the beats wireless, much better price [ Jeff  Nov 26, 2016 ]
for my daughter [ Ramon San  Jan 24, 2016 ]
price and features [ CHRISTIANA  Dec 08, 2015 ]
I have the royal blue E40BTs and I love them. My family member wanted a pair as well, so we chose a different color to avoid mixing them up. [ Scott  May 30, 2017 ]
Best overall value [ James  Dec 10, 2016 ]
These were recommended by a Harman employee I know personally. [ T  Jul 21, 2016 ]
Works well with my I Phone and I Pad. [ Richard  May 03, 2016 ]

6 questions already asked

We do not carry the replacement cables, but you may be able to order one from JBL. You can contact them directly here: http://www.jbl.com/contactus [ Jeff  Dec 01, 2015 ]  Staff
don't know never tried [ JAMES  Jun 29, 2015 ]
Yes. Just go to JBL's Web site and locate the E40BT. Scroll down to, "Product Specs, Manuals & Compatibility." Then click on that and select the Spec Sheet or the Quick Start Guide. On the iPhone, you can touch the three little dots in the upper right and "share" the manual by emailing it to yourself, or you can open it in Safari (on the iPhone) and add it to the "Reading List" by touching the Open Book icon at the bottom of the screen. That way, you can just refer to the email you sent yourself, or open Safari's reading list and select the manual there. If you don't have an iPhone, I'm quite sure there are 2 or 3 ways to save the manual on whatever operating system you're using on your smartphone. Good luck. [ David  Jun 29, 2015 ]
I have a solution for iPhone if you are a iPhone user. Google jbl e49bt manual", click on the link that takes you to jbl. When it takes you to the page that displays your headphones then scroll to the bottom and click the + sign next to manuals & downloads. Select Quick Star Guide, this will open the manual on PDF, then on the top right click Open in iBooks. This will download the manual on your iBooks app. [ LUIS  Jun 28, 2015 ]
not sure on the phone.sorry [ Jeffrey  Jun 28, 2015 ]
Yes, JBL site has a user manual pdf that you can save locally. [ Raymond  Jun 28, 2015 ]
You certainly can get online manuals from the JBL website . Just do a product search and scroll to the bottom of the page . Specs and manuals are located there . Good luck ! [ DANIEL  Jun 28, 2015 ]
Not sure [ Al  Jun 28, 2015 ]
Yes. I had a 5s for a while and paired fine with these [ LUIS  Apr 03, 2015 ]
Absolutely . Simply sync to Bluetooth and you're off and running . Works with iPad and android devices just as easy . These sound great too . One fault ..... They must be synced each time that you use them . Your phone will list them but you have to " forget this device " and resync . Other than that they're great . Good luck . You won't find a better set of BT headphones for the price . [ DANIEL  Apr 03, 2015 ]
Yes, perfectly. I'm listening to them on an iPhone 5s right now. [ David  Apr 03, 2015 ]
I don't know for sureas I have a Samsung phone, but if it has Bluetooth then they should get along just fine. [ Steven  Apr 03, 2015 ]
They do. See under the details tab online for specifics: Bluetooth: The Synchros E40BT supports Bluetooth 3.0, with A2DP v1.3, AVRCP v1.5, HFP v1.6, and HSP v1.2. The left ear cup is equipped with a microphone featuring Konnexx echo-cancellation technology to give you a clean connection and clear, hands-free calling. The headphones are compatible with iPad (mini, 3rd and 4th gen), iPhone (5s, 5c, 5, and 4s), iPod touch, MacBook Air, MacBook Pro, Mac mini, Android 1.5 Cupcake to Android 4.4 KitKat, and Blackberry 1.0 to Blackberry 10 OS. [ MARK  Apr 03, 2015 ]
Blue headphone [ Jang  Dec 13, 2014 ]
The noise reduction is excellent I listencil to music at all levels and the sound is clear I also use it make phone calls and it works perfect no echo or distorted sounds. I love the quality I also brought my son one as a Birthday gift. [ Michael  Dec 10, 2014 ]
The external noise reduction is not great. However, the sound quality is phenomenal if you pump enough volume into them.. [ valdo  Dec 08, 2014 ]
The external noise reduction is not great. However, the sound quality is phenomenal if you pump enough volume into them.. [ valdo  Dec 08, 2014 ]
Noise reduction is the same for any on ear headphone, minimally passive. I purchased these for my wife but I have used them. The sound quality is fantastic but probably not your best choice for a trip on an airplane. They almost seem more comfortable than my over the ear JBL E50BT's. I have a good sized head and they fit great. You might get more of a passive noise cancelling from the E50BT. Hope this helped. [ JASON J  Dec 08, 2014 ]
This headphone is light. Noise reduction is ok. It's not noise canceling. Very easy to set up with Bluetooth devices. Battery lasts very long before recharging. I also have the e50bt. That's bigger and excellent noise reduction. [ Al  Dec 07, 2014 ]
I've had no issues with noise reduction . As far as sizing , they fit my head just fine ( and I have a pretty large head ) . The only issue I have , which is minor , is with comfort after wearing these awhile ..... The ear pads hold heat , therefore creating sweat . Other that this , I'd highly recommend . Good luck with your purchase . [ DANIEL  Dec 07, 2014 ]
The noise reduction on the JBL E40BT was OK and the music level was just fine, I have a big head and didn't feel any discomfort at all while using these for walking/jogging and at the gym. I did however had pairing problem with these, it seem that every day that I was going to use them it lost bluetooth connection with my iPhone or Macbook. Got tired of that and that's why I opted out for a pair of Bose SoundLink Bluetooth, I love the sound and noise reduction on these much better and the paring problem disappeared [ LUIS  Dec 07, 2014 ]
They are Christmas gifts that I haven't given yet to my kids. I'll let you know as soon as they open it. I'm planning to give it to them next week. [ RAJA  Dec 07, 2014 ]
I have been enjoying these headphones for a couple of months. They are not actively noise reducing but the foam earpieces fit comfortably and block out normal household background noise. I have a hat size of 7? inches and these are just fine. For the money I think they would be hard to beat. [ PETER  Dec 07, 2014 ]
I think the sound is perfect. I also have a big head but haven't had any difficulty in wearing the earphones for one or two hours. All in all 100% satisfied with this purchase. [ warren  Dec 07, 2014 ]
No noise reduction it all. Not the most comfortable fitting. My ears got a little sore after wearing them for a while. Okay for the price. [ Richard  Dec 07, 2014 ]
First, these headphones sound just great both as Bluetooth and wired. I read the Same reviews where someone stretched the set by placing them over the back of a couch overnight. That works if you find them to be too tight. These aren't noise canceling sets like Bose of that type, but they do block noise effectively. You can listen to these while mowing your lawn without having to turn them up dangerously high. They stay on pretty well unless you're trying to go jogging or something. I got them for the convenience of Bluetooth and was surprised at how great they sound. These are a very goof deal. [ David  Dec 07, 2014 ]
Wifi is not Bluetooth so don't confuse the two. [ thomas  Aug 09, 2016 ]
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Krissy  Aug 18, 2014 ]  Staff
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